tests/testthat/test-make_linelist.R

In linelist: Tagging and Validating Epidemiological Data

test_that("tests for make_linelist", {

  # test errors
  msg <- "Must be of type 'data.frame', not 'NULL'."
  expect_error(make_linelist(NULL), msg)

  msg <- "Must have at least 1 cols, but has 0 cols."
  expect_error(make_linelist(data.frame()), msg)

  msg <- "Must be element of set {'speed','dist'}, but is"
  expect_error(make_linelist(cars, outcome = "bar"), msg, fixed = TRUE)

  expect_error(
    make_linelist(cars, outcome = "bar", age = "bla"), 
    "2 assertions failed"
  )

  msg <- "Use only tags listed in `tags_names()`, or set `allow_extra = TRUE`"
  expect_error(
    make_linelist(cars, foo = "speed", allow_extra = FALSE),
    msg,
    fixed = TRUE
  )

  # test functionalities
  expect_identical(tags_defaults(), tags(make_linelist(cars), TRUE))

  x <- make_linelist(cars, date_onset = "dist", date_outcome = "speed")
  expect_identical(tags(x)$date_onset, "dist")
  expect_identical(tags(x)$date_outcome, "speed")
  expect_null(tags(x)$outcome)
  expect_null(tags(x)$date_reporting)

  x <- make_linelist(cars, foo = "speed", bar = "dist", allow_extra = TRUE)
  expect_identical(
    tags(x, TRUE),
    c(tags_defaults(), foo = "speed", bar = "dist")
  )

})

test_that("make_linelist() works with dynamic dots", {

  expect_identical(
    make_linelist(cars, date_onset = "dist", date_outcome = "speed"),
    make_linelist(cars, !!!list(date_onset = "dist", date_outcome = "speed"))
  )

})

test_that("make_linelist() errors on data.table input", {

  dt_cars <- structure(
    cars,
    class = c("data.table", "data.frame")
  )

  expect_error(
    make_linelist(dt_cars),
    "NOT be a data.table"
  )

})